The ProShares UltraPro QQQ ETF (TQQQ) closed on January 23rd at $88.34, up 0.62%, as optimism around artificial intelligence and a boost in global risk sentiment lifted technology stocks. The Nasdaq 100, which TQQQ tracks, saw a 0.22% increase to 21,900.93, driven by President Trump's announcement of AI infrastructure investments, which bolstered investor confidence in tech-heavy indices. Additionally, the market's focus on quarterly earnings and recent policy reforms contributed to the positive sentiment, despite some weakness in mega-cap stocks and rising Treasury yields. The rally in tech stocks was further supported by a decrease in market volatility, encouraging investors to increase their exposure to Big Tech and AI themes.